Electbical meastteing instbttment



Feb. 1 9, 1929. 1,702,41 6

A. R. RUTTER ET AL ELECTRICAL MEASURING INSTRUMENT Filed June 10, 1927UUUUHUHU Wa/fer G. Mg/l'us ATTORNEY Patented Feb. 19, 1929.

UNITED STATES PATENT OFFECE.

ARGYLE RyRUTTER'Al lD WALTER G. MY LIUS, OF WILKINSBURG, PENNSYLVANIA,AS-

SIGNORS TO WESTINGHOUSE EIHEIC'IIRR'J PORATION OF PENNSYLVANIA" ANDMANUFACTURING COMPANY," A COR- ELECTRICALIJMEASURING IiisTliUifiIiNTf-Application iua'mih' in,

Our invention relates to electrical measuring instruments embodying meter mechanisms Supporting bases and enclosing casings orcovers.

Our inventionreside s in means reami taining the cover or casing o'fa'nielectrical measuring instrument in cooperative relationwith a basememberjn such manner that an unauthorized person may not readily jinserta wire or'pother smallinstr ument into such' cover or casing to ailieottheopc-r ation or. rotation jof the, mea urin mechanism. Othercharacteristics of bur apparatus are itsie xtreme simplicity, ease; of'n' a'nutacture, and the employment of standardrmeterfparts.

It is further characteristic of ouri inve n- 'tion a that a connectingmember is employed :for securing the covento the basemember' and thatsaid' connecting member islsuitably retained against casual displacementfrom its proper openingin the coverlQf g' j ,f

It isffu'rther characteristic oi 0ur,'ii1 veIition that a wing nut orthe like is utilize i011 holding the cover member} to,the baseaiidttliata resilient washer is utilized forfproperly} distributing thepressure fexerted V l necting member, on Hthe cover lf,al H Ourinvention nes de i th fa'ppafa s. nd features of construction "oii'fthe'character hereinafter described and claimed: the foregoing andfurthercharacteristicsof jour in vention being determinablefromthe-followdescription.

For an illustration of one ,bfim an forms our apparatus may take,fefe'renceis to be had to the accompanying drawing, 'in which: 4 v

Figure 1 is a view, in front elevatiomof an electrical measuringinstrument, having a cover secured in position in accordance with ourinvention, Q; 1

Fig. 2 is an elevational view, partly in section, of the electricalmeasuring instrument shown in Fig. 1,

Fig. 3 is an enlarged elevational view of a connecting memberconstructed in accordance with our invention, and

Fig. 4: is a view, in section, of a stud member constituting a. part ofthe connecting member shown in Fig. 4.

In Figs. 1 and 2 is illustrated an electric measuring instrument and,more specifically, a maximum-demand meter 1 provided with a cover 2 forenclosing the metering mechanism F1927 seri l Nb} 197,828.

'4 'that iis sec ired "tb' "a'ba' 3 mproper assembled relation. Onlydapoition of the [meter mechanism 1 is sh0wn ,;that portion 'Fig'. 2"being an elevationof a-dragmagnet 4 that operatesf to dam'pen therotation of the dlsk '(noashq p of, the maximumr-de- :1 jrn cordanc withour invention, standard parts of a watthour' meter are utilized in theconstruction of a. maximum-demand 1 I'1,e-ter, and, tojthis end, we haveevolved a arrangement for securing, .the standard Wing Emits ordinarilyemployed inwattjhour meters to thes, supporting standards or memersex'tendin'gjrom thebase'iof the instrument; a a; .In practicin'gfourinvfe ntion} we interpose pa: ring shaped member between the coverand the meter base, wherebylitbe depth of the covenisincreasedisuificiently tn.-,permit the enclosure oi; the additional,mechanismf necess'ary'l forjcaiisinglaiwatthdur meter. to operateasama-aimumdemand meterfi she I ninFiggfl, depth of thefcover 2 isincreased by a rin g 6 provided a projecting portion i7 similar to the.projecting portion 8 of. the lowerportion of the cover .2, "Thedimensions voftheQ'ring 6 are such that the loweriporti on'8 of thecoverf2 cooperates wifih thq upper portion 9 ofthe ring member inairnanner similar to, the oooperation ofthef' lower portion 8 of thecover 2 vith the base of the,m eter 3. The standard 1 supporting members10 employedin the. constructiongof. an (ordinary watthour meter are madeof a. definite predeterinined length, and it is a purpose; of ourinvention, to utilize such: standard support.- ing members when securingthe cover 2 to the base 3 even though the. cover 2 has been spaced fromthebase 3 by the introduction of the auxiliary ring 6. For accomplishinthis purpose, we provide an elongated member or stud 11 that is adaptedto form the main part of a connecting member 12 which holds the cover 2in assembled relation to the base 3.

The stud 11 may consist of any suitably shaped connected member but weprefer that it shall comprise an interiorly threaded inner portion 13for engagement with the threaded portion 14 of the supporting member 10.The cross-sectional area of the urmer portion of the stud 11 isdecreased, as illustrated in Fig. 4, for the reception of a resilientwasher threaded portion 18 of the stud 11, said I assen'iblez'l on stud11.

threaded portion 18 being provided with a cored-out portion 19, theupper rim of which (Figs. 3 and l) is spun over the top of the wing nut17 after the various parts have been As a result of the spinningoperation, the. wing nut .17 and the stud 1 1 are formed into a unitarymechanical structure'so that the connecting member 12 may be secured tothe supporting member upon rotation of the wing nut 17. 4

. The wing nut 17, or equivalent, may be secured to the stud 11in anysuitable manner but we prefer that it be secured as outlined above,making it approximately as solid as if made from'a single piece.

The wash rs 15 and 16 may he of any suitable materiahbut, in acordancewith our in vention, we prefer that the resilient washer 15 shall be ofa material, such felt, and that it shalt be supported by washer 155 thatof a relatively stifi' material, such as steel.

In order that the connecting members 12 shall be retained in the cover 2when the latter is removed from the base 3 and the studs 10, we providemeans for preventing the stud 11 from slipping; through thelopenings 20in the cover 2. Any suitablemeans may be used to accomplish thispurpose, such as a removable resilient ring 21 that is .held in place byits cooperation with a circumferential slot 22 in stud 11.

YVe claim as our invention 1. The combination with base on which metermechanism is supported, of a cover for said meter mechanism c'arriedlbysaid base, and means for securing said cover-to. said base comprising amember projecting from said base and terminating interiorly o1"saidcover, and a connecting'memb'er interposed between said cover andsaid projecting member, said connecting member having means associatedtherewith for retention thereof in said cover.

2. The combination wit-ha base on which meter mech anism is supported,of a cover for sai'dmcte'r mechanism carried by said base comprisinga'member projecting from said base and terminating interiorly of saidcover and a connectitng member interposed between said cover and saidprojecting member, said connecting member comprising a stud, a wing nutsecured tosaid stud, aaresil-ient' washer for separating said Wingn-utandsaid-cover and a removable ring mounted onsaid stud for retainingsaid stud in said cover.

3. -A- devicefor 'co-operation with a supporting member and a coverhaving an opening, said device" comprising an elongated memberext-ending through said opening and engaging said supporting member, awing nut secured to said elongated member and means forming a resilientcontact between said cover and said wing nut, said means beingpermanently secured to said elongated memberby said wing nut.

4, A meter casing, a cover therefor provided with an opening, a threadedbolt extending from said casing in line with said opening to a pointwithin said cover, a connecting member on said bolt for holding saidcover in place, said member comprising,a stud extending through-theopening in said cover having athreaded outerportion', a wing nut forsaid member, a portion of said outer portion being spun over a portionof said wing nut, a resilient washer and a relatively stilf washersecured between said stud and said wing nut and a resilient ring mountedin an inset in said stud. V

5. A meter structure, a cover there-for provided with opening, athreaded boltfextending from said structure in line with said opening toapoin't within said cover, a device for holding saidcover in placecomprising an elongated member'having a threaded portion engaging saidthreaded bolt, a wing nutthreaded to tin-end portion of said member,said end portionbeing spun over a portion of said wing nut and means fortransmitting pressure from saidwing nut to the other of said relatedmembers including a felt Washer supported by a relatively stiff washer,said washers being secured to said elongated memher by said win g nut.

In testimony whereof, we have hereunto subgcribed our names this 2nd dayof June, 192 I ARGYLE- R. BUTTER. WVALTER G. MYLIUS.

